Here is a list of reasons why ODSTs are more bad ass than Spartans:
01)Marine Corps
02)Semper Fi
03)they don't need military grade steroids to be badasses
04)no mommy and/or daddy issues
05) orbital -blam!-ing drops! Feet first! And no fancy armor to protect them while they do it.
06) more personality than a brick. Suck it Master Chief
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ODSTs suck. I'd rather have Spartans on my side than lolODSTs. I don't remember a ODST blowing up a Halo ring. I don't remember an ODST crashing through an Assault Carrier [i] with [/i] a Covenant bomb then arming the bomb, causing the ship to asplode and I most certainly don't remember an ODST getting the Scarab Gun.